Waterstop

Details Waterstop Waterstop

E - Fixed Constructions

04

B

72/141

E04B 1/682 (2006.01) E01C 11/10 (2006.01) E04B 1/68 (2006.01)

Patent

CA 1278436

ABSTRACT OF THE DISCLOSURE A WATERSTOP The waterstop used to prevent passage or leakage of water through a construction joint of concrete is shaped of a plastic or rubber in the form of a continuous-length belt-like form and provided with a water-swellable rubbery layer on at least a portion, or, for example, along the peripheries of the belt-like form, side-by-side coming into contact with the concrete bodies to serve as a water-tight filling of the joint by being swollen with water. The water-swellable rubbery layer is protected temporarily prior to use with a coating film of an alkali- soluble polymeric material which can at least partially be dissolved away by the alkalinity of the water in the concrete joint. The peripheries of the plastic- or rubber-made belt-like form are preferably in a length-wise bulged form having a bore running therethrough to serve as a stress absorber when the water-swellable rubbery layer is swollen with water. The disclosure also includes a particularly preferred water-swellable rubbery composition formed of a matrix comprising an acrylonitrile-butadiene rubber, polyvinyl chloride resin and chlorinated poly- ethylene and a dispersed phase of a water-swellable cross- linked polymer.

518999

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